Method rand

java/Chapter 18/Question18_3/QuestionAlternate.java:8–10

(int lower, int higher)

	/* Random number between lower and higher, inclusive */
	public static int rand(int lower, int higher) { 
		return lower + (int)(Math.random() * (higher - lower + 1));
	}
	
	/* pick M elements from original array, using only elements 0 through i (inclusive).*/
	public static int[] pickMRecursively(int[] original, int m, int i) {